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High-sulfur cobalt copper ore treatment process with low cost and high leaching rate

A technology of treatment process and leaching rate, applied in the field of treatment technology of high-sulfur cobalt copper ore, can solve the problems of equipment corrosion, high equipment requirements, long leaching period of bioleaching method, etc., and achieve the effect of low cost and low energy cost

Active Publication Date: 2017-07-04
ZHEJIANG HUAYOU COBALT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The methods currently being used to treat high-sulfur cobalt-copper ores include high-pressure oxygen leaching, chlorate oxidation leaching, bioleaching, etc., but high-pressure leaching requires high equipment, high investment costs, and high safety hazards. Oxidative leaching introduces harmful elements such as chlorine, causing corrosion of equipment and degradation of copper extractant. Bioleaching has a long leaching cycle and is generally used for leaching of low-grade sulfide ores.

Method used

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  • High-sulfur cobalt copper ore treatment process with low cost and high leaching rate

Examples

Experimental program
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Effect test

Embodiment 1

[0021] The high-sulfur cobalt-copper ore slurry (Co7.5%, Cu17.66%, Fe7.55%, S25.33%) with a solid content of 60% is transported into a 32㎡ conical fluidized furnace at a speed of 13t / h, and oxygen-enriched air is blown 150m³ / min, oxygen concentration 26%, boiling roasting at 520°C, roasting time 14.5h, air velocity 0.23 m / s, air-to-material ratio 1.15m³ / kg; flue gas enters cyclone dust collector for dust removal, flue gas oxygen concentration 8%, sulfur dioxide The concentration is 5.5%, and then go through the electrostatic precipitator for dust removal, and the flue gas furnace gas purification process is followed by contact with legal acid; the calcined sand at the outlet of the fluidized fluidized furnace is mixed with the smoke and dust produced by the cyclone dust collector and the electrostatic precipitator, and the mixture goes to the low acid leaching stirring tank, and the leaching pH 2. The leaching temperature is 70°C, the leaching time is 2 hours, and the liquid-so...

Embodiment 2

[0024] High-sulfur cobalt-copper ore slurry (Co7.7%, Cu17.32%, Fe8.55%, S26.31%) containing 50% solids is transported into a 32㎡ conical fluidized furnace at a speed of 14t / h, and oxygen-enriched air is blown 150 m³ / min, oxygen concentration 26%, boiling roasting at 600°C, roasting time 16h, air velocity 0.25 m / s, air-to-material ratio 1.29 m³ / kg; flue gas enters cyclone dust collector for dust removal, flue gas oxygen concentration 8.5%, sulfur dioxide Concentration of 5.14%, and then go through the electrostatic precipitator for dust removal, flue gas furnace gas purification process and then contact legal acid; the calcined sand at the outlet of the fluidized fluidized furnace is mixed with the smoke and dust produced by the cyclone dust collector and the electrostatic precipitator, and the mixture goes to the low acid leaching stirring tank, and the leaching pH 2. The leaching temperature is 75°C, the leaching time is 2 hours, and the liquid-solid ratio is 12:1. After being...

Embodiment 3

[0027] The high-sulfur cobalt-copper ore slurry (Co7.6%, Cu16.89%, Fe7.85%, S25.79%) with a solid content of 70% is transported into a 32㎡ conical fluidized furnace at a speed of 13t / h, and oxygen-enriched air is blown 150 m³ / min, oxygen concentration 26%, boiling roasting at 680°C, roasting time 12.5h, air velocity 0.27 m / s, air-material ratio 1m³ / kg; flue gas enters cyclone dust collector for dust removal, flue gas oxygen concentration 7.5%, sulfur dioxide Concentration of 6.5%, and then go through the electrostatic precipitator for dust removal, flue gas furnace gas purification process and then contact with legal acid; the calcined sand at the outlet of the fluidized fluidized furnace is mixed with the smoke and dust produced by the cyclone dust collector and the electrostatic precipitator, and the mixture goes to the low-acid leaching stirring tank, and the leaching pH 1.5, leaching temperature 80°C, leaching time 2h, liquid-solid ratio 15:1, after being thickened by a thi...

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Abstract

The invention belongs to the technical field of metallurgy, and in particular, relates to a high-sulfur cobalt copper ore treatment process. The high-sulfur cobalt copper ore treatment process with low cost and high leaching rate mainly comprises such procedures as fluidized-bed roasting, low-acid leaching, flotation, high-acid leaching, high-copper extraction and low-copper extraction. The sulfation rates of cobalt and copper after fluidized-bed roasting of a high-sulfur cobalt copper ore are both higher than 85%; the leaching rates of cobalt and copper are both higher than 98%; the cobalt and copper grades of leaching slag are respectively lower than 0.15% and 0.30%; the roasting process is a self-heating process without replenishing external energy; the energy cost is low; steam generated by the ore fluidized-bed roasting can be used for heating wet leaching, fluidized-bed roasting of the high-sulfur cobalt copper ore, leaching and flotation; and other accessories are not needed besides of adding of few flotation reagents, so that the accessory cost is low, and such harmful elements as chlorine cannot be introduced to cause corrosion of equipment and degradation of a copper extracting agent.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a treatment process for high-sulfur cobalt-copper ore. Background technique [0002] The methods currently being used to treat high-sulfur cobalt-copper ores include high-pressure oxygen leaching, chlorate oxidation leaching, bioleaching, etc., but high-pressure leaching requires high equipment, high investment costs, and high safety hazards. Oxidative leaching introduces chlorine and other harmful elements, causing equipment corrosion and copper extractant degradation. Bioleaching has a long leaching cycle and is generally used for leaching low-grade sulfide ores. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a low-cost high-sulfur cobalt-copper ore treatment process with low equipment requirements, small investment, short production cycle, low production cost, and no introduction of har...

Claims

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Application Information

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IPC IPC(8): C22B3/08C22B1/10C22B15/00C22B23/00C25C1/12B03D1/00B03D103/04
CPCB03D1/00B03D2203/04C22B1/10C22B3/08C22B15/0015C22B15/0071C22B23/005C22B23/043C25C1/12Y02P10/20
Inventor 俞建明王伟东阮远常李国民伊少林白龙刚
Owner ZHEJIANG HUAYOU COBALT
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